Macro element for pile-head cyclic lateral loading, Special Topics in Earthquake Geotechnical Engineering, Geotechnical

Interaction between laterally loaded piles and the surrounding soil is a complex phenomenon, particularly when nonlinear soil behaviour is involved; so complex that usually design calculations rely on computer software based on discrete spring formulations using empirically derived nonlinear p-y rel...

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Main Authors:	Pender, M.J., Wotherspoon, L., Sa’don, N.M, Orense, R.P
Format:	Book
Language:	English
Published:	SpringerLink 2012
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://ir.unimas.my/2722/ http://ir.unimas.my/2722/1/10.1007%252F978-94-007-2060-2_5

id	unimas-2722
recordtype	eprints
spelling	unimas-27222015-03-24T00:54:43Z http://ir.unimas.my/2722/ Macro element for pile-head cyclic lateral loading, Special Topics in Earthquake Geotechnical Engineering, Geotechnical Pender, M.J. Wotherspoon, L. Sa’don, N.M Orense, R.P TA Engineering (General). Civil engineering (General) Interaction between laterally loaded piles and the surrounding soil is a complex phenomenon, particularly when nonlinear soil behaviour is involved; so complex that usually design calculations rely on computer software based on discrete spring formulations using empirically derived nonlinear p-y relationships. This chapter explores a macro element, Davies and Budhu (1986), as an alternative which uses relatively simple formulae that are available for evaluating the lateral stiffness of long elastic piles embedded in elastic soil and an extension to handle nonlinear soil-pile interaction. The predictions of these equations are confirmed using the three dimensional finite element software OpenSeesPL, Lu et al. (2010), as well as data from field lateral load testing on driven piles in a stiff residual soil at a North Auckland site. Furthermore, in this chapter an extension of the macro element to cyclic loading is presented and this is shown to model well the field data and also the predictions of OpenSeesPL. The pile head macro element method is not completely general as it applies only to a homogeneous soil profile, but, since we deal with long piles, the soil homogeneity needs to extend only over the pile shaft active length. Measured lateral load response of the piles at the Auckland site indicates that it is necessary to distinguish the “operational” modulus of the soil from the small strain modulus; the field data indicates a value of about one third to one quarter of the small strain value. SpringerLink 2012 Book NonPeerReviewed text en http://ir.unimas.my/2722/1/10.1007%252F978-94-007-2060-2_5 Pender, M.J. and Wotherspoon, L. and Sa’don, N.M and Orense, R.P (2012) Macro element for pile-head cyclic lateral loading, Special Topics in Earthquake Geotechnical Engineering, Geotechnical. Geotechnical, Geological and Earthquake Engineering, 16 . SpringerLink. ISBN 978-94-007-2060-2 (online)
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Sarawak
building	UNIMAS Institutional Repository
collection	Online Access
language	English
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Pender, M.J. Wotherspoon, L. Sa’don, N.M Orense, R.P Macro element for pile-head cyclic lateral loading, Special Topics in Earthquake Geotechnical Engineering, Geotechnical
description	Interaction between laterally loaded piles and the surrounding soil is a complex phenomenon, particularly when nonlinear soil behaviour is involved; so complex that usually design calculations rely on computer software based on discrete spring formulations using empirically derived nonlinear p-y relationships. This chapter explores a macro element, Davies and Budhu (1986), as an alternative which uses relatively simple formulae that are available for evaluating the lateral stiffness of long elastic piles embedded in elastic soil and an extension to handle nonlinear soil-pile interaction. The predictions of these equations are confirmed using the three dimensional finite element software OpenSeesPL, Lu et al. (2010), as well as data from field lateral load testing on driven piles in a stiff residual soil at a North Auckland site. Furthermore, in this chapter an extension of the macro element to cyclic loading is presented and this is shown to model well the field data and also the predictions of OpenSeesPL. The pile head macro element method is not completely general as it applies only to a homogeneous soil profile, but, since we deal with long piles, the soil homogeneity needs to extend only over the pile shaft active length. Measured lateral load response of the piles at the Auckland site indicates that it is necessary to distinguish the “operational” modulus of the soil from the small strain modulus; the field data indicates a value of about one third to one quarter of the small strain value.
format	Book
author	Pender, M.J. Wotherspoon, L. Sa’don, N.M Orense, R.P
author_facet	Pender, M.J. Wotherspoon, L. Sa’don, N.M Orense, R.P
author_sort	Pender, M.J.
title	Macro element for pile-head cyclic lateral loading, Special Topics in Earthquake Geotechnical Engineering, Geotechnical
title_short	Macro element for pile-head cyclic lateral loading, Special Topics in Earthquake Geotechnical Engineering, Geotechnical
title_full	Macro element for pile-head cyclic lateral loading, Special Topics in Earthquake Geotechnical Engineering, Geotechnical
title_fullStr	Macro element for pile-head cyclic lateral loading, Special Topics in Earthquake Geotechnical Engineering, Geotechnical
title_full_unstemmed	Macro element for pile-head cyclic lateral loading, Special Topics in Earthquake Geotechnical Engineering, Geotechnical
title_sort	macro element for pile-head cyclic lateral loading, special topics in earthquake geotechnical engineering, geotechnical
publisher	SpringerLink
publishDate	2012
url	http://ir.unimas.my/2722/ http://ir.unimas.my/2722/1/10.1007%252F978-94-007-2060-2_5
first_indexed	2018-09-06T14:52:57Z
last_indexed	2018-09-06T14:52:57Z
_version_	1610870243099410432

Macro element for pile-head cyclic lateral loading, Special Topics in Earthquake Geotechnical Engineering, Geotechnical

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